Black truffle of the Ribagorza Food and drink · Lascuarre, La Ribagorza, Huesca Image of Lascuarre, not of the place itself. The holm-oak scrub of the Baja Ribagorza yields black truffle from December to March, gathered with a trained dog; it is grated raw over eggs and meats or preserved in oil and in the comarca's cured sausages. Photo: El Mono Español (CC BY-SA 4.0) What to see and do in Lascuarre